Tavassoli M, Javadi S, Firozi R, Rezaei F, Khezri Ar, Hadian M
Department of Pathobiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran.
Iran J Parasitol. 2012;7(4):110-5.
We tried to investigate the hair contamination of pet dogs and farm sheepdog with Toxocara eggs in terms of the different sex and age groups in north-west of Iran (Urmia and its suburbs).
Hair samples were collected from a total of 138 pet and farm sheepdogs from November 2008 to June 2009 in Urmia City and the suburb (West Azerbaijan-Iran) and examined for the presence of T. canis eggs.
T. canis eggs found in 60 samples altogether (pet and shepherd dogs) showed a contamination rate of 36.2%. The number of observed T. canis eggs in each microscope field was varied from 1 to > 400. The age of the dog was found a significant factor to influence the prevalence and intensity of contamination, with 82% of all the eggs recovered from puppies (six months and younger). Additionally, the numbers of eggs in farm sheepdogs were significantly higher than pet dogs (P<0.05).
This report shows that direct contact with T. canis infected dogs, particularly puppies from shepherd dogs, may pose a serious hazard to human. Besides, as they may harbor a considerable number of eggs on their hair, they can contaminate the soil and the environment.
我们试图针对伊朗西北部（乌尔米耶及其郊区）不同性别和年龄组的宠物狗和农场牧羊犬，调查其毛发被犬弓首蛔虫卵污染的情况。
2008年11月至2009年6月期间，在乌尔米耶市及其郊区（伊朗西阿塞拜疆省），共采集了138只宠物狗和农场牧羊犬的毛发样本，检测其中犬弓首蛔虫卵的存在情况。
在总共60个样本（宠物狗和牧羊犬）中发现了犬弓首蛔虫卵，污染率为36.2%。每个显微镜视野中观察到的犬弓首蛔虫卵数量从1到超过400不等。发现狗的年龄是影响污染发生率和污染强度的一个重要因素，所有回收的虫卵中82%来自幼犬（6个月及以下）。此外，农场牧羊犬身上的虫卵数量显著高于宠物狗（P<0.05）。
本报告表明，与感染犬弓首蛔虫的狗直接接触，尤其是来自牧羊犬的幼犬，可能对人类构成严重危害。此外，由于它们的毛发上可能携带大量虫卵，会污染土壤和环境。
